get_current_blog_id(). Props aaroncampbell. fixes #15233

git-svn-id: https://develop.svn.wordpress.org/trunk@16050 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/general-template.php

@@ -491,6 +491,18 @@ function get_bloginfo( $show = '', $filter = 'raw' ) {
 	return $output;
 }
 
+/**
+ * Retrieve the current blog id
+ *
+ * @since 3.1.0
+ *
+ * @return int Blog id
+ */
+function get_current_blog_id() {
+	global $blog_id;
+	return absint($blog_id);
+}
+
 /**
  * Display or retrieve page title for all areas of blog.
  *